testicle pain and swelling can sometimes be caused by getting sexually aroused but not ejaculating (coming); it can also be a sign of an infection, such as chlamydia

What to do

Get advice from your GP or a healthcare professional at a GUM clinic if you have pain during or after sex. They'll try to find the cause of the problem and be able to tell you whether you need any treatment. For example:

if you have pain, unusual discharge, itchiness or soreness around your genitals, they may recommend treatment for thrush or an STI test

if your vagina is dry, you may be advised to try using a lubricant – remember to use a water-based product if you're using condoms because oil-based lubricants can damage them and make them ineffective

if you have an allergy or irritation around your genitals, you may be advised to avoid using products that could be causing it

if there's an emotional reason or anxiety that's causing problems, a counsellor or sex therapist may be able to help – your GP or sexual health clinic can refer you to one